Skip to main content

Research Repository

Advanced Search

Polypyrrole/TiO2 nanotube arrays with coaxial heterogeneous structure as sulfur hosts for lithium sulfur batteries

Zhao, Yun; Zhu, Wen; Chen, George Z.; Cairns, Elton J.

Authors

Yun Zhao

Wen Zhu

Profile Image

GEORGE CHEN GEORGE.CHEN@NOTTINGHAM.AC.UK
Professor of Electrochemical Technologies

Elton J. Cairns



Abstract

The lithium-sulfur cell has shown great prospects for future energy conversion and storage systems due to the high theoretical specific capacity of sulfur, 1675 mAh g−1. However, it has been hindered by rapid capacity decay and low energy efficiency. In this work, polypyrrole (PPy)/TiO2 nanotubes with coaxial heterogeneous structure as the substrate of the cathode is prepared and used to improve the electrochemical performance of sulfur electrodes. TiO2 nanotubes decorated with PPy provide a highly ordered conductive framework for Li+ ion diffusion and reaction with sulfur. This architecture also is helpful for trapping the produced polysulfides, and as a result attenuates the capacity decay. Furthermore, the heat treatment temperature used in the sulfur loading process has been confirmed to have an important impact on the overall performance of the resultant cell. The as-designed S/PPy/TiO2 nanotube cathode using an elevated heating temperature shows excellent cycling stability with a high discharge capacity of 1150 mAh g−1 and average coulombic efficiency of 96% after 100 cycles.

Journal Article Type Article
Publication Date Sep 30, 2016
Journal Journal of Power Sources
Print ISSN 0378-7753
Electronic ISSN 0378-7753
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 327
Pages 447-456
APA6 Citation Zhao, Y., Zhu, W., Chen, G. Z., & Cairns, E. J. (2016). Polypyrrole/TiO2 nanotube arrays with coaxial heterogeneous structure as sulfur hosts for lithium sulfur batteries. Journal of Power Sources, 327, 447-456. https://doi.org/10.1016/j.jpowsour.2016.07.082
DOI https://doi.org/10.1016/j.jpowsour.2016.07.082
Keywords Coaxial heterogeneous structure; Lithium batteries; Sulfur; Polypyrrole; TiO2 nanotubes
Publisher URL http://www.sciencedirect.com/science/article/pii/S0378775316309570
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

Files

Manuscript Text-revised.pdf (1.7 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





You might also like



Downloadable Citations

;